/*
 * @Author: qin
 * @Date:   2018-11-20
 * +----------------------------------------------------------------------
 * | json格式转换兼容 [ 后台管理系统公共配置信息 ]
 * +----------------------------------------------------------------------
 */
layui.define(function (exports) {
    if (typeof JSON !== "object") {
        JSON = {};
    }

    (function () {
        "use strict";

        var rx_one = /^[\],:{}\s]*$/;
        var rx_two = /\\(?:["\\\/bfnrt]|u[0-9a-fA-F]{4})/g;
        var rx_three = /"[^"\\\n\r]*"|true|false|null|-?\d+(?:\.\d*)?(?:[eE][+\-]?\d+)?/g;
        var rx_four = /(?:^|:|,)(?:\s*\[)+/g;
        var rx_escapable = /[\\"\u0000-\u001f\u007f-\u009f\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/g;
        var rx_dangerous = /[\u0000\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/g;

        function f(n) {
            // Format integers to have at least two digits.
            return (n < 10)
                ? "0" + n
                : n;
        }

        function this_value() {
            return this.valueOf();
        }

        if (typeof Date.prototype.toJSON !== "function") {

            Date.prototype.toJSON = function () {

                return isFinite(this.valueOf())
                    ? (
                        this.getUTCFullYear()
                        + "-"
                        + f(this.getUTCMonth() + 1)
                        + "-"
                        + f(this.getUTCDate())
                        + "T"
                        + f(this.getUTCHours())
                        + ":"
                        + f(this.getUTCMinutes())
                        + ":"
                        + f(this.getUTCSeconds())
                        + "Z"
                    )
                    : null;
            };

            Boolean.prototype.toJSON = this_value;
            Number.prototype.toJSON = this_value;
            String.prototype.toJSON = this_value;
        }

        var gap;
        var indent;
        var meta;
        var rep;


        function quote(string) {

// If the string contains no control characters, no quote characters, and no
// backslash characters, then we can safely slap some quotes around it.
// Otherwise we must also replace the offending characters with safe escape
// sequences.

            rx_escapable.lastIndex = 0;
            return rx_escapable.test(string)
                ? "\"" + string.replace(rx_escapable, function (a) {
                var c = meta[a];
                return typeof c === "string"
                    ? c
                    : "\\u" + ("0000" + a.charCodeAt(0).toString(16)).slice(-4);
            }) + "\""
                : "\"" + string + "\"";
        }


        function str(key, holder) {

// Produce a string from holder[key].

            var i;          // The loop counter.
            var k;          // The member key.
            var v;          // The member value.
            var length;
            var mind = gap;
            var partial;
            var value = holder[key];

// If the value has a toJSON method, call it to obtain a replacement value.

            if (
                value
                && typeof value === "object"
                && typeof value.toJSON === "function"
            ) {
                value = value.toJSON(key);
            }

// If we were called with a replacer function, then call the replacer to
// obtain a replacement value.

            if (typeof rep === "function") {
                value = rep.call(holder, key, value);
            }

// What happens next depends on the value's type.

            switch (typeof value) {
                case "string":
                    return quote(value);

                case "number":

// JSON numbers must be finite. Encode non-finite numbers as null.

                    return (isFinite(value))
                        ? String(value)
                        : "null";

                case "boolean":
                case "null":

// If the value is a boolean or null, convert it to a string. Note:
// typeof null does not produce "null". The case is included here in
// the remote chance that this gets fixed someday.

                    return String(value);

// If the type is "object", we might be dealing with an object or an array or
// null.

                case "object":

// Due to a specification blunder in ECMAScript, typeof null is "object",
// so watch out for that case.

                    if (!value) {
                        return "null";
                    }

// Make an array to hold the partial results of stringifying this object value.

                    gap += indent;
                    partial = [];

// Is the value an array?

                    if (Object.prototype.toString.apply(value) === "[object Array]") {

// The value is an array. Stringify every element. Use null as a placeholder
// for non-JSON values.

                        length = value.length;
                        for (i = 0; i < length; i += 1) {
                            partial[i] = str(i, value) || "null";
                        }

// Join all of the elements together, separated with commas, and wrap them in
// brackets.

                        v = partial.length === 0
                            ? "[]"
                            : gap
                                ? (
                                    "[\n"
                                    + gap
                                    + partial.join(",\n" + gap)
                                    + "\n"
                                    + mind
                                    + "]"
                                )
                                : "[" + partial.join(",") + "]";
                        gap = mind;
                        return v;
                    }

// If the replacer is an array, use it to select the members to be stringified.

                    if (rep && typeof rep === "object") {
                        length = rep.length;
                        for (i = 0; i < length; i += 1) {
                            if (typeof rep[i] === "string") {
                                k = rep[i];
                                v = str(k, value);
                                if (v) {
                                    partial.push(quote(k) + (
                                        (gap)
                                            ? ": "
                                            : ":"
                                    ) + v);
                                }
                            }
                        }
                    } else {

// Otherwise, iterate through all of the keys in the object.

                        for (k in value) {
                            if (Object.prototype.hasOwnProperty.call(value, k)) {
                                v = str(k, value);
                                if (v) {
                                    partial.push(quote(k) + (
                                        (gap)
                                            ? ": "
                                            : ":"
                                    ) + v);
                                }
                            }
                        }
                    }

// Join all of the member texts together, separated with commas,
// and wrap them in braces.

                    v = partial.length === 0
                        ? "{}"
                        : gap
                            ? "{\n" + gap + partial.join(",\n" + gap) + "\n" + mind + "}"
                            : "{" + partial.join(",") + "}";
                    gap = mind;
                    return v;
            }
        }

// If the JSON object does not yet have a stringify method, give it one.

        if (typeof JSON.stringify !== "function") {
            meta = {    // table of character substitutions
                "\b": "\\b",
                "\t": "\\t",
                "\n": "\\n",
                "\f": "\\f",
                "\r": "\\r",
                "\"": "\\\"",
                "\\": "\\\\"
            };
            JSON.stringify = function (value, replacer, space) {

// The stringify method takes a value and an optional replacer, and an optional
// space parameter, and returns a JSON text. The replacer can be a function
// that can replace values, or an array of strings that will select the keys.
// A default replacer method can be provided. Use of the space parameter can
// produce text that is more easily readable.

                var i;
                gap = "";
                indent = "";

// If the space parameter is a number, make an indent string containing that
// many spaces.

                if (typeof space === "number") {
                    for (i = 0; i < space; i += 1) {
                        indent += " ";
                    }

// If the space parameter is a string, it will be used as the indent string.

                } else if (typeof space === "string") {
                    indent = space;
                }

// If there is a replacer, it must be a function or an array.
// Otherwise, throw an error.

                rep = replacer;
                if (replacer && typeof replacer !== "function" && (
                    typeof replacer !== "object"
                    || typeof replacer.length !== "number"
                )) {
                    throw new Error("JSON.stringify");
                }

// Make a fake root object containing our value under the key of "".
// Return the result of stringifying the value.

                return str("", {"": value});
            };
        }


// If the JSON object does not yet have a parse method, give it one.

        if (typeof JSON.parse !== "function") {
            JSON.parse = function (text, reviver) {

// The parse method takes a text and an optional reviver function, and returns
// a JavaScript value if the text is a valid JSON text.

                var j;

                function walk(holder, key) {

// The walk method is used to recursively walk the resulting structure so
// that modifications can be made.

                    var k;
                    var v;
                    var value = holder[key];
                    if (value && typeof value === "object") {
                        for (k in value) {
                            if (Object.prototype.hasOwnProperty.call(value, k)) {
                                v = walk(value, k);
                                if (v !== undefined) {
                                    value[k] = v;
                                } else {
                                    delete value[k];
                                }
                            }
                        }
                    }
                    return reviver.call(holder, key, value);
                }


// Parsing happens in four stages. In the first stage, we replace certain
// Unicode characters with escape sequences. JavaScript handles many characters
// incorrectly, either silently deleting them, or treating them as line endings.

                text = String(text);
                rx_dangerous.lastIndex = 0;
                if (rx_dangerous.test(text)) {
                    text = text.replace(rx_dangerous, function (a) {
                        return (
                            "\\u"
                            + ("0000" + a.charCodeAt(0).toString(16)).slice(-4)
                        );
                    });
                }

// In the second stage, we run the text against regular expressions that look
// for non-JSON patterns. We are especially concerned with "()" and "new"
// because they can cause invocation, and "=" because it can cause mutation.
// But just to be safe, we want to reject all unexpected forms.

// We split the second stage into 4 regexp operations in order to work around
// crippling inefficiencies in IE's and Safari's regexp engines. First we
// replace the JSON backslash pairs with "@" (a non-JSON character). Second, we
// replace all simple value tokens with "]" characters. Third, we delete all
// open brackets that follow a colon or comma or that begin the text. Finally,
// we look to see that the remaining characters are only whitespace or "]" or
// "," or ":" or "{" or "}". If that is so, then the text is safe for eval.

                if (
                    rx_one.test(
                        text
                            .replace(rx_two, "@")
                            .replace(rx_three, "]")
                            .replace(rx_four, "")
                    )
                ) {

// In the third stage we use the eval function to compile the text into a
// JavaScript structure. The "{" operator is subject to a syntactic ambiguity
// in JavaScript: it can begin a block or an object literal. We wrap the text
// in parens to eliminate the ambiguity.

                    j = eval("(" + text + ")");

// In the optional fourth stage, we recursively walk the new structure, passing
// each name/value pair to a reviver function for possible transformation.

                    return (typeof reviver === "function")
                        ? walk({"": j}, "")
                        : j;
                }

// If the text is not JSON parseable, then a SyntaxError is thrown.

                throw new SyntaxError("JSON.parse");
            };
        }
    }());
    exports('json', {});
});


